IFG = fasting P-glucose 5.6-6.9 mmol/L and 2 hr P-glucose < 7.8 mmol/L; IGT = fasting P-glucose <5.6 mmol/L and 2 hr P-glucose in OGTT 7.8-11.0 mmol/L;diabetes = fasting P-glucose ≥ 7.0 mmol/L and/or 2 hr P-glucose ≥ 11.1 mmol/L.